UAS regulatory sequences drive expression of sxc carrying the amino acid replacement N948I (this is the lesion present in sxc4).
sxcN948I.UAS/Scer\GAL4Tub.PU fails to rescue sxc6/sxc1
The expression of sxcN948I.Scer\UAS under the control of Scer\GAL4tub.PU does not rescue the pharate adult stage lethality of sxc1/sxc6.